Banking spacer for universal chucks



Sept. 26, 1950 G. CAPELLAZZI BANKING SPACER FOR UNIVERSAL cHucKs Filed Oct. 4, 1944 Fl H1- JNVENTOR. Gd Zdo Cap e d I BY 5 A T TOR N E Patented Sept. 26, 1950 UNiTED STATES PATENT OFFICE j g 7 I 2,524,006 I "BANKING SPACER FOR UNIVERSAL chucks Gildo Cap'ellazzi, New York, N; Y. Application October 4, 1944, Serial No. 557,168

This invention relatesto new and useful improvements in banking": spacers .for universal chucks.

3 Claims. (Cl. 279-110) More specifically the invention proposes the a used in combination with a universal chuck having a flat face across which the jaws of the chuck move. The banking spacers are removably mounted on the flat face to be engaged by the face of a piece of work gripped by the jaws to maintain the piece of work flat and prevent it from being flexed inwards under the pressure applied through the tools being used to work thereon.

Still further the banking spacers are mounted upon the chucks in a manner to be used in combination with disc-like work being gripped by the jaws and which has a normal tendency to flex inwards and be distorted out of a natural plane under the pressure of working tools being used thereon. H

A further object of the invention proposes forming the banking spacers in different shapes and or a length slightly longer than the depth of the particular step of the gripping jaws gripping the work in a manner to retain the work to be gripped merely by its peripheral edge.

, A further object of the invention proposes a hovel means for permitting the length of the banking spacers to be adjusted to meet the requirements of a particular job being grippedby the chuck.

A further object of the invention proposes the provision of a means whereby the banking spacer's "are formed of telescopic engaged sections with a means for fixedly holding the sections in various adjusted positions to adjust the operative length thereof.

It is a further object of the invention to construct banking spacers 'for universal chucks which are simple and durable and which can be manufactured and sold at a reasonable cost.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a perspective View of a universal chuck provided with banking spacers constructed in accordance with this invention.

Fig. 2 is a side elevational view of a portion of Fig. 1 with a piece of work for position in; the chuck.

'igp3 is a perspective developed view of one of the banking spacers per se.

Fig. 4 is an enlarged vertical sectional view through one of the banking spacers.

ig. 5 is aview similar. to Fig. 4 but illustratin a modification of the invention.

Fig. 6 is a perspective view of a banking spacer modification of the invention. v

Fig. '7 is a plan view of the banking spacer constructed in accordance with still another modification of the invention. 7

Fig. 8 is an enlarged vertical sectional view of the banking spacer shown in Fig. '7.

Fig. 9 is an enlarged detail view of a portion of Fig. 8. r

The banking spacer for universal chucks, according to this invention, is adapted to be used in combination with universal chucks It having a flat face It across which the gripping jaws l2 of the chuck are adapted to move. The operative position of the jaws 12 are adapted to be adjusted by a removable turning tool 13. ,However, further details of the chuck will not be given in this specification as such chucks are generally known in the art and the details of the operatin mechanism are known by those skilled by the art.

A plurality of banking spacers M are removably mounted on the fiat face ll of the chuck ac and positioned between the jaws 12. Each .of the banking spacers l4 comprises a tube I5 adapted to be engaged in position removably upon the face I! by means of a screw It. The screw I6 passes freely through the tube l5 and threadedly engages complementary openings l7 formed in the face H, There is a plurality of openings l7! arranged radially of the face i l permitting the position of the tubes l5 to be adjusted on the face It to correspond with diameter of the work engaged in the chuck. The screws it have beveled heads [6 which are adapted to seat in complementary beveled recess l8 provided on the top of the tube I5.

As shown in Fig. 2 the work I9 is gripped at its peripheral edge by the jaws I2 and rests upon the banking spacer I4. The banking spacer M is of a length slightly greater than the particular steps of the gripping jaws l2 which engage the peripheral edge of the work it so as to support the work in a slightly raised position off the step. These banking spacers are designed to be used primarily when supporting disc-like work constructed in accordance with a still further in the chuck Ill so as to prevent the work from being flexed inwards under the pressure of working tools being used thereon.

In the modification of the invention disclosed in Fig. the tube I5 is formed of several sections l5, l5 I5, I5 and I5 The sections l5 and 15 merely comprise disc-like washers engaged upon the bottom of the tube, while the sections |5, I5 and I5 have inter-engaging portions for assisting and stacking these sections.

Forming tube R5 of separate sections permits the operative length to be varied by the insertion and removal of certain of the-sections.

In other respects this form of the invention is similar to that previously shown andlike reference numerals identify like parts in each of the several views.

In the modification of the invention shown in Fig. 6 the banking spacers I5" is square in cross section as compared .with the rounded configuration of the previous forms of the invention.

In other respects this form of the invention is similar to that previously shown and like reference numerals identify like parts in each of the several views.

In the modification of the invention disclosed in Fig. 7 to 9 the banking spacer 15" consists of v a base section 15 and a top section 15 The top section I5 is formed with a depending portion 20 which slidably extends into the base section l5 for connecting the sections.

Means is provided for retaining the telescopically engaged sections IS and [B in various adjusted positions. This means comprises a set screw 2| which is rotatively supported in the top section 15 and which has its bottom end threadedly engaged into a complementary opening 22 formed in the base section Ni In a loosened condition of the screw It, the set screw 2| is adapted to be rotated in one direction or the other for extending or retracting the top section 15 with relation to the bottom section 15*.

The rotative mounting of the set screw 21 in the top section IS is accomplished by forming the top section of superimposed portions welded together along a line 23. The adjacent faces of the portions of the top section 15 are formed with aligned recesses 24 in which a collar 25 is rotatively disposed. The collar is secured to the set screw 2! after the free end thereof has been passed through the top portion of the top section |5 and then the bottom portion of the top section is slipped over the free end of the set screw 2| and the top and bottom portions are secured together to form an integral unit thereof. Thus, the set screw 2| is rotative in the top section i5 but is not axially slidable relative thereto In other respects this form of the invention is similar to that previously shown and like reference numerals identify like parts in each of the several views.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure .by United States Letters Patent is:

1. In combination with a universal chuck having a flat face across which the jaws of the chuck move, a plurality of banking spacers removably mounted on said flat face for engaging against the face of and supporting a piece of work gripped by said jaws, each of said banking spacers being formed of a base section seated on the fiat face of the chuck and a top section telescopically engaged with said base section, and a set screw rotatively supported in said top section and threadedly engaging said base section for holding said top section in various adjusted positions relative to said base section.

2. The combination with a lathe chuck of an attachment therefor comprising a base section and a top section having a projection telescopically fitted in the base section, a screw extending through the top and base sections and threaded into the chuck, and a set screw threaded into the base section and rotatively but nonslidably extended through the top section to hold the two sections in desired telescopically adjusted positions.

3. The combination with a lathe chuck of an attachment therefor comprising a base section and a top section having a projection telescopically fitted in the base section, a screw extending through the top and base sections and threaded into the chuck, and a set screw threaded into the base section and rotatively but nonslidably extended through the top section to hold the two sections in desired telescopically adjusted positions, said top section being formed of superimposed portions having their adjacent faces secured together, said portions being formed with aligned recesses arranged concentric with said set screw, and a collar mounted on said set screw and rotatively disposed in said aligned recesses forming the rotative connection of said set screw with said top section.

GILDO CAPELLAZZI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,802,655 Kavle Apr. 28, 1931 2,291,687 Brobst Aug. 4, 1942 

